claude-code - 💡(How to fix) Fix Iuuse while compacting [1 comments, 2 participants]

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anthropics/claude-code#55180Fetched 2026-05-02 05:46:09
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

I was coding using Claude Terminal with 4 separate terminal sessions open. Each terminal had its own dedicated context provided through separate .md files.

However, after compacting , continuing work from Terminal 1, Claude unexpectedly picked up the context from Terminal 4 instead of using the context associated with Terminal 1. When asked it mentioned its received through compacted data.

What Should Happen?

It should have usd its provided context instead of picking up other context.

Error Messages/Logs

Steps to Reproduce

Create 4 terminal claude instace provide seperate context with sperat md files check after compacting of one of the terminal session note: I did not do many experiments, but this is what i found, there has to be some cnteext leak between each terminal session while comapcting

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

2.1.123

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The issue may be resolved by ensuring that each terminal session has a unique identifier or context separation to prevent context leakage during compacting.

Guidance

  • Verify that the .md files used for providing context to each terminal session are correctly formatted and do not contain any conflicting information.
  • Check if the compacting process is correctly handling the context switching between terminal sessions, and consider adding additional logging to identify the source of the context leakage.
  • Test the scenario with a smaller number of terminal sessions to see if the issue persists, which can help determine if the problem is related to the number of sessions or the compacting process itself.
  • Consider using a different method for providing context to each terminal session, such as using environment variables or command-line arguments, to see if the issue is specific to the .md file approach.

Notes

The issue may be related to the compacting process or the way context is being handled between terminal sessions. Further investigation is needed to determine the root cause of the problem.

Recommendation

Apply workaround: Use a unique identifier or context separation for each terminal session to prevent context leakage during compacting, as this is the most likely cause of the issue and can be tested and verified without requiring significant changes to the existing code.

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claude-code - 💡(How to fix) Fix Iuuse while compacting [1 comments, 2 participants]